Liquid distribution spray head and cooling tower

Abstract

The utility model discloses a liquid distribution spray head and a cooling tower, and the liquid distribution spray head comprises a main frame which is provided with a water inlet pipe; the plurality of rotary water dishes are rotatably mounted on the main frame, and the plurality of rotary water dishes are sequentially arranged along the water outlet direction of the water inlet pipe; each rotating water disc is provided with a hollow flow channel, the intercepting areas of the hollow flow channels of the rotating water discs are gradually reduced in the water outlet direction of the water inlet pipe, and all the hollow flow channels correspond to the water inlet pipe. According to the liquid distribution spray head and the cooling tower, the problem of poor spraying effect of the liquid distribution spray head in the prior art is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling towers, and more specifically, to a liquid distribution nozzle and a cooling tower. Background Art

[0002] With the continuous progress of China's industrial technology and the increasing requirements for energy conservation, cooling towers, as key industrial heat exchange equipment, have been widely used in fields such as data centers, rail transit, and electronic factories. Spraying, as a key part of cooling tower technology, has an important impact on the cooling performance and operation stability of the entire tower.

[0003] Currently, for common single-disk liquid distribution nozzles, when installed on the water distribution tray, problems such as thick water films, interference in adjacent water dispersion, droplet aggregation, and large installation space are likely to occur, resulting in poor spraying effects.

[0004] For other multi-disk liquid distribution nozzles in the prior art, such as the three-splash type with fixed water disks, they have high requirements for water pressure, and the spraying effect is not good under low water pressure.

[0005] In summary, the liquid distribution nozzles in the prior art have poor spraying effects. Summary of the Utility Model

[0006] An embodiment of the utility model provides a liquid distribution nozzle and a cooling tower to solve the problem of poor spraying effects of the liquid distribution nozzles in the prior art.

[0007] To achieve the above object, the utility model provides a liquid distribution nozzle, including: a main frame, on which there is a water inlet pipe; a plurality of rotating water disks, which are rotatably installed on the main frame, and the plurality of rotating water disks are arranged in sequence along the water outlet direction of the water inlet pipe; each rotating water disk has a hollow flow channel, and along the water outlet direction of the water inlet pipe, the cross-sectional flow areas of the hollow flow channels of the plurality of rotating water disks gradually decrease, and all the hollow flow channels are correspondingly arranged with the water inlet pipe.

[0008] Further, it further includes: a fixed water disk, which is arranged at the bottom of the main frame, all the rotating water disks are located between the water inlet pipe and the fixed water disk, and the fixed water disk is correspondingly arranged with the hollow flow channels of the adjacent rotating water disks.

[0009] Further, the fixed water disk has a conical head, and the tip of the conical head faces the hollow flow channel of the adjacent rotating water disk.

[0010] Further, an inner pipe wall is provided inside the water inlet pipe. The internal channel surrounded by the inner pipe wall forms a first water inlet channel, and a second water inlet channel is formed between the inner pipe wall and the water inlet pipe. The second water inlet channel surrounds the outer periphery of the first water inlet channel. The water outlet end of the first water inlet channel faces the hollow flow channel of the rotating water disc, and the water outlet end of the second water inlet channel faces the guiding surface of the rotating water disc.

[0011] Further, a water inlet is provided on the water inlet pipe. The water inlet is communicated with the first water inlet channel, and the water inlet height of the water inlet is lower than the water inlet height of the water inlet end of the second water inlet channel.

[0012] Further, the top end of the water inlet pipe forms the water inlet ends of the first water inlet channel and the second water inlet channel. The water inlet extends from the top end of the water inlet pipe in the water inlet direction. The inner pipe wall is connected to the side wall of the water inlet, and the water inlet is connected to the water inlet end of the first water inlet channel.

[0013] Further, a top cover extends outward from the outer wall of the water inlet pipe. The top cover is used to limit the shaking of the liquid distribution nozzle when the liquid distribution nozzle is on the water distribution tray.

[0014] Further, a clamping structure is provided on the main frame. The clamping structure is correspondingly arranged with the top cover, and the clamping structure is used to clamp and fix the liquid distribution nozzle and the water distribution tray.

[0015] Further, a first guiding wall is provided on the first surface of the rotating water disc, and a plurality of tangential water outlet ports are formed at the circumferential edge of the rotating water disc.

[0016] Further, a plurality of second guiding walls are provided on the first surface of the rotating water disc. The second guiding walls are arranged at intervals. Each second guiding wall forms an inclined water outlet port at the circumferential edge of the rotating water disc. The inclined water outlet port faces the lower part of the liquid distribution nozzle. The second guiding walls form a first flow channel. One end of the first flow channel is communicated with the hollow flow channel, and the other end is communicated with the inclined water outlet port.

[0017] Further, a guiding area is formed between two adjacent second guiding walls. A plurality of first guiding walls are arranged at intervals in the guiding area. The first guiding walls form a plurality of second flow channels in the guiding area. The second flow channels are communicated with the tangential water outlet ports.

[0018] Further, the rotating water disc has a second surface opposite to the first surface. A first sliding part is provided on the second surface of the rotating water disc, and a second sliding part is provided on the main frame. The first sliding part is in sliding fit with the second sliding part. The rotating water disc rotates on the main frame through the sliding fit of the first sliding part and the second sliding part.

[0019] Further, the first sliding portion is a chute or a pulley set; the second sliding portion is a pulley set or a chute corresponding to the first sliding portion.

[0020] Further, diversion lines are provided on the side wall of the hollow flow channel.

[0021] According to another aspect of the present invention, a cooling tower is provided, which includes the above-mentioned liquid distribution nozzle.

[0022] The present invention adopts a multi-disk design, and all the rotating water disks can rotate for spraying. Such a setting has the advantages of a wide water dispersion area and a high droplet dispersion degree. Each rotating water disk is provided with a hollow flow channel, and the water flowing out from the water inlet pipe has a small flow resistance in its water outlet direction, and it is easy to distribute the flow to all the rotating water disks. The flow distribution advantage is large, and the water flow can be fully dispersed at a high flow rate, forming a multi-layer spraying effect, effectively improving the spraying effect. In the case of a low flow rate, when the water flow passes through the rotating water disk with a larger cross-sectional area of the hollow flow channel, most of it will enter the next rotating water disk and be diverted and sprayed on the appropriate rotating water disk. The structural design in which the cross-sectional areas of the hollow flows of multiple rotating water disks gradually decrease can ensure the spraying range in the case of a low flow rate and improve the spraying effect at a low flow rate. Compared with various structural types of liquid distribution nozzles in the prior art, the liquid distribution nozzle of the present invention can improve the spraying range and enhance the spraying effect whether in the case of a high flow rate or a low flow rate. Description of the Drawings

[0023] Figure 1 is a schematic diagram of the water flow of the liquid distribution nozzle in the embodiment of the present invention under a low flow rate;

[0024] Figure 2 is a schematic diagram of the water flow of the liquid distribution nozzle in the embodiment of the present invention under a high flow rate;

[0025] Figure 3 is a schematic structural diagram of the liquid distribution nozzle in the embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of the bracket and the water inlet pipe of the liquid distribution nozzle in the embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of the rotating water disk of the liquid distribution nozzle in the embodiment of the present invention;

[0028] Figure 6 is a schematic diagram of the water flow of the rotating water disk of the liquid distribution nozzle in the embodiment of the present invention;

[0029] Figure 7It is a perspective view of the rotating water disc of the liquid distribution nozzle according to an embodiment of the present utility model in another direction. Detailed implementation manners

[0030] The present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present utility model.

[0031] See Figures 1 to 7 As shown, according to an embodiment of the present utility model, a liquid distribution nozzle is provided. The liquid distribution nozzle includes a main frame 10, a water inlet pipe 20, and a plurality of rotating water discs 30. The main frame 10 is provided with the water inlet pipe 20; the rotating water discs 30 are rotatably mounted on the main frame 10, and the plurality of rotating water discs 30 are arranged in sequence along the water outlet direction of the water inlet pipe 20; each rotating water disc 30 has a hollow flow channel 31, and along the water outlet direction of the water inlet pipe 20, the cross-sectional flow areas of the hollow flow channels 31 of the plurality of rotating water discs 30 gradually decrease, and all the hollow flow channels 31 are correspondingly arranged with the water inlet pipe 20.

[0032] The present utility model adopts a multi-disc design, and all the rotating water discs can rotate for spraying. Such a setting has the advantages of a wide water spraying area and a high droplet dispersion degree. Each rotating water disc is provided with a hollow flow channel, and the water flowing out from the water inlet pipe 20 has a small flow resistance in its water outlet direction, which is beneficial to all the water flowing out being distributed to all the rotating water discs. The flow rate distribution advantage is large, and the water flow can be fully dispersed at a high flow rate, forming a multi-layer spraying effect, effectively improving the spraying effect. In the case of a low flow rate, when the water flow passes through the rotating water disc with a larger cross-sectional flow area of the hollow flow channel, most of the water will enter the next rotating water disc and be guided and sprayed on the appropriate rotating water disc. The appropriate rotating water disc can achieve its maximum spraying range according to the water flow rate. The structural design in which the cross-sectional flow areas of the hollow flow channels 31 of the plurality of rotating water discs 30 gradually decrease solves the problem that in the case of a low flow rate, part of the water flow will be diverted by the first-layer rotating water disc, resulting in insufficient power of the multi-stage water discs, fully ensuring the spraying range of the liquid distribution nozzle at a low flow rate and improving the spraying effect. Compared with various structural types of liquid distribution nozzles in the prior art, the liquid distribution nozzle of the present utility model can improve the spraying range and the spraying effect both in the case of a high flow rate and a low flow rate.

[0033] It should be explained and noted that: there are various implementation manners for all the hollow channels 31 to be correspondingly arranged with the water inlet pipe 20. For example, when the axes of all the hollow channels 31 are collinear or all the hollow channels 31 are arranged overlapping along a certain axis, the water outlet of the water inlet pipe 20 faces the hollow channels 31 so that the water flowing out of the water outlet of the water inlet pipe 20 can flow through all the hollow channels 31 in sequence. For example, when the axes of all the hollow channels 31 are non-collinear (such as staggered or forming a certain inclination angle between the axes), the water inlet sides of all the hollow channels face the water outlet of the water inlet pipe, always enabling the water flowing out of the water inlet pipe 20 to flow through all the hollow channels in sequence. That is, the corresponding arrangement of all the hollow channels 31 with the water inlet pipe 20 is to enable the water flowing out of the water inlet pipe to flow through all the hollow channels in sequence, including various structural combinations for achieving the above effects that are not shown here, and will not be elaborated too much here.

[0034] The liquid distribution nozzle further includes a fixed water tray 40, the fixed water tray 40 is arranged at the bottom of the main frame 10, all the rotating water trays 30 are located between the water inlet pipe 20 and the fixed water tray 40, and the fixed water tray 40 is correspondingly arranged with the hollow channels 31 of the adjacent rotating water trays 30.

[0035] After the water is split and sprayed by the rotating water trays at the middle position, the remaining water will impact on the fixed water tray from the hollow channel 31 (with the smallest cross-sectional area) of the last rotating water tray. The fixed water tray 40 is stationary and mainly sprays the remaining water on the packing area directly below the liquid distribution nozzle to ensure the spraying range.

[0036] Combined with Figure 3 As shown, the fixed water tray 40 has a conical head 41, and the tip of the conical head 41 faces the hollow channel 31 of the adjacent rotating water tray 30.

[0037] The conical head 41 has a water-facing conical tip and a conical surface for guiding the flow. The remaining water will impact on the fixed water tray from the hollow channel 31 (with the smallest cross-sectional area) of the last rotating water tray. The remaining water can fully cover the packing area directly below the liquid distribution nozzle along the conical surface, thus effectively avoiding the problem of the packing covering the hollow area under the traditional rotating nozzle.

[0038] Preferably, combined with Figures 1 to 4 As shown, an inner pipe wall 21 is arranged in the water inlet pipe 20. The internal channel surrounded by the inner pipe wall 21 forms a first water inlet channel 20a, and a second water inlet channel 20b is formed between the inner pipe wall 21 and the water inlet pipe 20. The second water inlet channel 20b surrounds the outer periphery of the first water inlet channel 20a;

[0039] The water outlet end of the first water inlet channel 20a faces the hollow channel 31 of the rotating water tray 30, and the water outlet end of the second water inlet channel 20b faces the guiding surface of the rotating water tray 30.

[0040] Through the structural design of the inner pipe wall 21, part of the water flow flows towards the hollow flow channel 31 after passing through the first water inlet channel 20a, ensuring that this part of the water flow directly enters the rotating water disc of the next layer to the greatest extent and ensuring multi-layer spraying. And part of the water flow passes through the second water inlet channel 20b towards the guiding surface of the rotating water disc, is sprayed on the first-layer rotating water disc and drives the rotating water disc 30 to rotate.

[0041] Preferably, a water inlet 22 is provided on the water inlet pipe 20. The water inlet 22 is communicated with the first water inlet channel 20a, and the water inlet height of the water inlet 22 is lower than the water inlet height of the water inlet end of the second water inlet channel 20b.

[0042] When operating at low flow rate, the working medium water cannot enter the water inlet end of the second water inlet channel 20b due to the low liquid level, and can only flow in from the water inlet 22. At this time, the water flow directly converges into the first water inlet channel 20a. When the water flow at low flow rate passes through the rotating water disc with a larger cross-sectional area of the hollow flow channel, most of it will enter the next rotating water disc, and will be guided and sprayed on the appropriate rotating water disc, which can ensure the spraying range under low flow rate and improve the spraying effect at low flow rate. In this way, the problem that part of the water flow will be diverted by the first-layer rotating water disc under low flow rate, resulting in insufficient power of the multi-stage water discs, is solved, and the spraying range of the liquid distribution nozzle under low flow rate is fully guaranteed, and the spraying effect is improved. The structural relationship and position of the water inlet 22 and the first water inlet channel 20a are beneficial to the convergence of the water flow power under low flow rate, while the water flow power is sufficient under high flow rate and there is no need for convergence, and only the water flow needs to circulate.

[0043] For specific reference Figure 3 the top end of the water inlet pipe 20 forms the water inlet ends of the first water inlet channel 20a and the second water inlet channel 20b;

[0044] The water inlet 22 extends from the top end of the water inlet pipe 20 towards the water inlet direction. The inner pipe wall 21 is connected to the side wall of the water inlet 22, and the water inlet 22 is connected to the water inlet end of the first water inlet channel 20a. The advantage of the installation position and extension direction of the water inlet 22 is that when the system flow rate decreases and the liquid level continues to drop, the water inlet area of the water inlet 22 decreases synchronously, which is beneficial to stabilizing the water flow velocity and ensuring the rotational driving force.

[0045] The water inlet 22 adopts a lateral long-strip-shaped opening. When the system flow rate decreases and the liquid level is lower than the water inlet end of the second water inlet channel 20b (the top end of the water inlet pipe 20), the water inlet 22 serves as the only water inlet, and its water inlet area can decrease synchronously with the drop of the liquid level, so as to stabilize the liquid level of the nozzle under low flow rate (50%) and avoid uneven water distribution due to too low liquid level.

[0046] The first water inlet passage 20a and the second water inlet passage 20b function simultaneously under high flow rates. At this time, the water kinetic energy is sufficient, and the working medium water can pass through all the rotating water discs, fully exerting the spraying effect of multiple-stage rotation.

[0047] The outer wall of the water inlet pipe 20 extends outward to form a top cover 23, and the top cover 23 is used to limit the shaking of the liquid distribution nozzle when the liquid distribution nozzle is on the water distribution tray. The specific shape and thickness of the top cover 23 can be adjusted according to the water distribution tray. In this embodiment, the shape of the top cover 23 is an annular structure. In other embodiments not shown, the shape of the top cover 23 can also be a disc shape or a fan shape. When the liquid distribution nozzle is applied to the water distribution tray of a cooling tower, the structural cooperation of the top cover and the liquid distribution nozzle can limit the shaking of the nozzle under the action of water gravity.

[0048] Preferably, a clamping structure 11 is provided on the main frame 10, and the clamping structure 11 is arranged corresponding to the top cover 23. The clamping structure 11 is used to clamp and fix the liquid distribution nozzle to the water distribution tray. The structural form of the clamping structure 11 can be selected according to the specific structural combination. In this embodiment, the clamping structure 11 is a clamping protrusion. Of course, it can also be a clamping groove or a snap structure. The clamping structure 11 is to meet the installation requirements of the liquid distribution nozzle of the water distribution tray of a cooling tower. During installation, the liquid distribution nozzle can directly fall into the hole position of the water distribution tray and be snap-fixed, which is convenient for installation.

[0049] The structure of the main frame consists of a water inlet pipe, a hollow outer shaft in the middle of the water dispersion, and a fixed water disc at the bottom of the water distribution through a connecting arm to form an overall support frame for the nozzle. The structure of the main frame can also be selected according to other specific needs, and the present invention does not make specific limitations.

[0050] See Figures 5 to 7 , a first diversion wall 32 is provided on the first surface of the rotating water disc 30, and a plurality of tangential water outlets 30a are formed at the circumferential edge of the rotating water disc 30.

[0051] The function of the first diversion wall 32 is to divert the water flow impacting the rotating water disc to the tangential water outlet 30a, and the tangential water outlet 30a throws the water flow along the tangential direction of the rotating water disc to form spraying and sprinkling. The shape of the first diversion wall 32 can be an arc or other shapes.

[0052] Preferably, a plurality of second diversion walls 33 are provided on the first surface of the rotating water disc 30. The second diversion walls 33 are arranged at intervals, and each second diversion wall 33 forms an inclined water outlet 30b at the circumferential edge of the rotating water disc 30, and the inclined water outlet 30b faces the lower part of the liquid distribution nozzle;

[0053] The second diversion wall 33 forms a first flow channel 34, one end of the first flow channel 34 communicates with the hollow flow channel 31, and the other end communicates with the inclined water outlet 30b.

[0054] The water flow impacting on the rotating water disc, a part of which enters the first flow channel 34 and flows through the first flow channel 34 to the inclined water outlet 30b. Since the inclined water outlet 30b faces downward of the liquid distribution nozzle, the downward dispersion degree of the water flow is increased, improving the uniform spraying effect.

[0055] See Figure 6 for the schematic diagram of the water flow direction. A diversion area is formed between two adjacent second diversion walls 33. A plurality of the first diversion walls 32 are arranged at intervals in the diversion area. The first diversion walls 32 form a plurality of second flow channels 35 in the diversion area, and the second flow channels 35 communicate with the tangential water outlet 30a.

[0056] The disc surface flow channel of the rotating water disc is arc-shaped. The flow rate is large at the diversion area. The first diversion wall 32 is arranged in the diversion area. The structures of the first diversion wall 32 and the tangential water outlet 30a provide the main tangential rotation driving force under the impact of the water flow. With the structure of the rotating water disc that can increase the rotation effect, the higher the rotation speed of the rotating water disc, the larger the oblique range of the first flow channel 34, the faster the flow velocity in the second flow channel 35, and the greater the dispersion degree from the tangential water outlet 30a. Under the combined action of the first flow channel 34 and the second flow channel 35, the dispersion degree of all water flows is increased, and the downward dispersion degree of the water flow is increased, improving the uniform spraying effect.

[0057] Combined with Figure 7 as shown, the rotating water disc 30 has a second surface opposite to the first surface. A first sliding part A1 is arranged on the second surface of the rotating water disc 30, and a second sliding part A2 is arranged on the main frame 10. The first sliding part A1 is in sliding fit with the second sliding part A2;

[0058] The rotating water disc 30 rotates on the main frame 10 through the sliding fit of the first sliding part A1 and the second sliding part A2.

[0059] In this embodiment, the rotating water disc adopts a large-area hollow design and forms a hollow flow channel. The hollow flow channels of all rotating water discs are coaxially arranged and form an integral flow channel from top to bottom. The hollow flow channel structure of the rotating water disc can be formed by the disc body itself or by the side walls extending downward. To cooperate with the hollow flow channel structure of the rotating water disc, the disc body is jointly supported by the first sliding part A1 and the second sliding part A2, which can meet the rotational fit while avoiding the flow channel at the middle position.

[0060] Preferably, the first sliding part A1 is a chute or a pulley set; the second sliding part A2 is a pulley set or a chute corresponding to the first sliding part A1. In this embodiment, the first sliding part A1 is an annular groove at the bottom of the dish body, and the second sliding part A2 is a plurality of pulley sets that fit with the annular groove. The structural cooperation can enable the rotating water dish to obtain a small frictional resistance and improve the rotation stability under the rotating driving force.

[0061] To improve the rotating power, guide lines 31a are provided on the side wall of the hollow flow channel 31.

[0062] The spiral guide lines 31a supplement the axial rotation driving force for the rotating water dish. The tangential rotation driving force of the dish body and the central axial rotation driving force form a synergistic effect, so as to ensure the driving of each rotating water dish under the multi-layer flow rate sharing, and obtain a sufficient rotating water scattering effect.

[0063] In this embodiment, the number of rotating water dishes is two, which are divided into a main rotating water dish and a secondary rotating water dish. In terms of structural adaptation, the hollow outer shaft of the main rotating water dish is nested in the hollow flow channel of the secondary rotating water dish with a gap. The cross-sectional flow areas of the hollow flow channels of the main rotating water dish and the secondary rotating water dish decrease from top to bottom, and the water flow can respectively impact on the main and secondary rotating water dishes and drive them to rotate.

[0064] Compared with the existing multi-dish structure, the greatest advantage of the present utility model is that multiple rotating water dishes can jointly provide rotating power. Secondly, the layout of the upper main and lower secondary water dishes is beneficial for both water dishes to obtain sufficient rotating power and fully disperse water droplets. At the same time, this layout can be matched with variable flow operation.

[0065] As the system operates with variable flow, the operating liquid level of the nozzle changes, and the water inlet pipe can adjust the water inlet mode according to the liquid level. To ensure the water scattering area and droplet dispersion degree of each water dish, the nozzle flow rate is distributed among the water dishes. Assuming that the distribution ratio of the main rotating water dish is 50%, the distribution ratio of the secondary rotating water dish is 40%, and the distribution ratio of the fixed water dish is 10%. When the operating liquid level is higher than the top end of the water inlet pipe under the full-load system cooling water flow rate, both the first water inlet channel and the second water inlet channel can play a role. When the system cooling water flow rate decreases to 50% under variable load operation, the operating liquid level drops to the liquid level corresponding to the water inlet 22.

[0066] The present utility model also provides an embodiment of a cooling tower, and the cooling tower includes the above-mentioned liquid distribution nozzle.

[0067] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0068] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0069] Of course, the above are the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art in the technical field of the present invention, without departing from the basic principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A liquid dispensing nozzle, characterized in that: include: A main frame (10), wherein the main frame (10) is provided with a water inlet pipe (20); a plurality of rotating water discs (30), the rotating water discs (30) being rotatably mounted on the main frame (10), and the plurality of rotating water discs (30) being arranged in sequence along the water outlet direction of the water inlet pipe (20); Each of the rotating water discs (30) has a hollow flow channel (31), and along the water outlet direction of the water inlet pipe (20), the cross-sectional area of ​​the hollow flow channels (31) of the plurality of rotating water discs (30) gradually decreases, and all of the hollow flow channels (31) are arranged corresponding to the water inlet pipe (20).

2. The liquid dispensing nozzle according to claim 1, characterized in that: Also includes: A fixed water disc (40), the fixed water disc (40) being arranged at the bottom of the main frame (10), all the rotating water discs (30) being located between the water inlet pipe (20) and the fixed water disc (40), and the fixed water disc (40) being arranged correspondingly to the hollow flow passage (31) of the adjacent rotating water disc (30).

3. The liquid dispensing nozzle according to claim 2, characterized in that: The fixed water disc (40) has a conical head (41), and the top of the conical head (41) faces the hollow flow channel (31) of the adjacent rotating water disc (30).

4. The liquid dispensing nozzle according to claim 1, characterized in that: An inner tube wall (21) is provided inside the water inlet pipe (20), an internal channel surrounded by the inner tube wall (21) forms a first water inlet channel (20a), a second water inlet channel (20b) is formed between the inner tube wall (21) and the water inlet pipe (20), and the second water inlet channel (20b) surrounds the outer periphery of the first water inlet channel (20a); The water outlet end of the first water inlet channel (20a) faces the hollow flow channel (31) of the rotating water disc (30), and the water outlet end of the second water inlet channel (20b) faces the guide surface of the rotating water disc (30).

5. The liquid dispensing nozzle according to claim 4, characterized in that: The water inlet pipe (20) is provided with a water inlet (22), the water inlet (22) is in communication with the first water inlet channel (20a), and the water inlet height of the water inlet (22) is lower than the water inlet height of the water inlet end of the second water inlet channel (20b).

6. The liquid dispensing nozzle according to claim 5, characterized in that: The top end of the water inlet pipe (20) forms the water inlet ends of the first water inlet channel (20a) and the second water inlet channel (20b); The water inlet (22) extends from the top end of the water inlet pipe (20) toward the water inlet direction, the inner tube wall (21) is connected to the side wall of the water inlet (22), and the water inlet (22) is connected to the water inlet end of the first water inlet channel (20a).

7. The liquid dispensing nozzle according to claim 1, characterized in that: The outer wall of the water inlet pipe (20) extends outward to form a top cover (23), and the top cover (23) is used to limit the shaking of the liquid distribution nozzle when the liquid distribution nozzle is on the water distribution tray.

8. The liquid dispensing nozzle according to claim 7, characterized in that: The main frame (10) is provided with a clamping structure (11), the clamping structure (11) being arranged corresponding to the top cover (23), and the clamping structure (11) is used for clamping and fixing the liquid distribution nozzle and the water distribution tray.

9. The liquid dispensing nozzle according to claim 1, characterized in that: A first guide wall (32) is provided on the first surface of the rotating water disc (30), and a plurality of tangential water outlets (30a) are formed on the circumferential edge of the rotating water disc (30).

10. The liquid dispensing nozzle according to claim 9, characterized in that: A plurality of second guide walls (33) are arranged on the first surface of the rotating water disc (30), the second guide walls (33) are arranged at intervals, and each of the second guide walls (33) forms an inclined water outlet (30b) at the circumferential edge of the rotating water disc (30), and the inclined water outlet (30b) faces below the liquid dispensing nozzle; The second flow guide wall (33) forms a first flow channel (34), one end of the first flow channel (34) is connected to the hollow flow channel (31), and the other end of the first flow channel is connected to the inclined water outlet (30b).

11. The liquid dispensing nozzle according to claim 10, characterized in that: A flow guide area is formed between two adjacent second flow guide walls (33), a plurality of first flow guide walls (32) are arranged at intervals in the flow guide area, the first flow guide walls (32) form a plurality of second flow channels (35) in the flow guide area, and the second flow channels (35) are connected to the tangential water outlet (30a).

12. The liquid dispensing nozzle according to claim 9, characterized in that: The rotating water disc (30) has a second surface opposite to the first surface, a first sliding portion (A1) is provided on the second surface of the rotating water disc (30), a second sliding portion (A2) is provided on the main frame (10), and the first sliding portion (A1) and the second sliding portion (A2) are slidably matched; The rotating water disc (30) rotates on the main frame (10) through the sliding cooperation between the first sliding part (A1) and the second sliding part (A2).

13. The liquid dispensing nozzle according to claim 12, characterized in that: The first sliding part (A1) is a slide groove or a pulley block; the second sliding part (A2) is a pulley block or a slide groove corresponding to the first sliding part (A1).

14. The liquid dispensing nozzle according to claim 1, characterized in that: A flow-guiding pattern (31a) is provided on the side wall of the hollow flow channel (31).

15. A cooling tower, characterized in that: A liquid dispensing nozzle comprising the liquid dispensing nozzle according to any one of claims 1 to 14.

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